https://www.gbceurope.com/en-ax/products/binding-machines--supplies/thermal-binding-supplies/gbc-standard-thermal-binding-covers19/
GBC Standard Thermal Binding Covers | GBC
Binding doesn't get any easier! GBC Standard Thermal Binding Covers - A5 1.5mm White (100) | Colour: white
gbc standardthermal bindingcovers